Device for holding incandescent-lamp filaments while the same are being flashed



' (No Model.)

H. LEMP & M. J. WIGHTMAN.

DEVICE FOR HOLDING INOANDESOENT LAMP FILAMENTS WHILE THE SAME ARE BEINGFLASHED.

No. 366,673. Patented July 19, 1887.

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UNETE STATES PATENT Trice.

HERMANN LEMP AND MERLE J. \VIGHTMAN, OF HARTFORD, CONNECTICUT,

ASSIGNOBS TO THE OF CONNECTICUT.

SCHUYLER ELECTRIC MANUFACTURING COMPANY,

DEVICE FOR HOLDING INCANDESCENT-LAIVIP FILAMENTS WHILE THE SAME AREBEING FLASHED.

SPECIFICATION forming part of Letters Patent. No. 366,673, dated July19, 1887.

Application filed August 1!), 1986. Serial No. $211,317.

To aZZ whom it may concern:

Be it known that we, HERMANN LEMP and MERLE J. WIGHTMAN, citizens of theUnited States, residing at Hartford, in the county of Hartford and Stateof Connecticut, have in vented a new and useful Device for HoldingFilaments for Incandescent Electric Lamps \Vhile Flashing the Same, ofwhich the follow ing is such a full, clear, and exact description aswill enable any one skilled in the art to which it appertaius to makeand use the same.

The object of our invention is to construct a device for the abovepurpose by which such filaments may be readily and expeditiously held inplace and kept in the circuit while flashing the same and be as easilyremoved therefrom. It has also for its object to provide means wherebythe ends of the filament may receive a larger deposit than the mainportion of the filament, so that it can be successfully fastened to themetallic terminals of the lamp.

The invention consists of two movable and two fixed jaws adapted toclamp the filament, having means for locking the same together and alsoapart, suitably insulated and pro vided with lineronnections, the wholebeing iueased in a receptacle which is suitably sealed; and it consists,also, in certain means, to be pointed out in the claims, forshortcircuiting the main portion of the filamcnt,while leaving the endsin circuit, so as to secure a larger contact-surface at the ends whenthey are joined to the metallic terminals ofthe lamp, which, as is wellknown, is very desirable in incandescent lamps; and it consists, also,in de tails of construction,which will be hereinafter claimed.

In the accompanying drawings, formi ng part of this specification, inwhich like letters of reference indicate like parts in the severaltigurcs. Figurel represents a front elevation of our invention. Fig. 2represents a side elevation thereof; Fig. 3, a plan view of our device,showing the short-circuiting devices for the main portion of thefilament in their normal position. Fig. 4: shows the same view of thesame partswith the short-circuiting devices in their operativeposition-that is, in contact (No model.)

with the filament; and Fig. 5 shows a bottom View of our device.

designates the filament, which is designed to be clamped by two pairs ofjaws, j j, the former pivoted to the support of the latter at the pointI). by means of a metal piece, a,which carries weights in w for openingthese jaws 5 when the locking-levers Z Z, which are pivoted to the fixedjaws j j and embrace the movablejawsjj, are raised. These locking'leversengage a curved portion of the jaws jj and clamp the filament firmlywhen they are forced 6o downward, but engage a notch in these jaws whensaid lovers are raised, so as to hold the jaws apart. The lixcdjawsjj'are carried by and secured to metal pieces mounted upon thecircular base (I, which are suitably insulated 6 carrying at each sidepivots for the contactbars at a, forming a sort of a toggle-joint. Themetal piece to the left (shown in Fig. 1) is rigidly connectcd to a rod,1-,which passes through the base d, and has a handle, h, extendingtherefrom, by which the contact-bars can be P operated. The base (I hasalso a hole, 0, in it, which may be used for admitting the hydrocarbonvapor to the globe g, within which the entire device is designed to besealed.

To have show u the globe sealed by sealing 8 material, 8, about the based,- but it may be sealed anywhere, and is only shown sealed at thispoint to represent the apparatus ready for operation.

The metal pieces carrying the fixed jaws are 0 provided withline-connections, as shown,and are suitably insulated from the base (I.

The operation of the apparatus is as follows: The globe g is removed,the locking-levers are raised, the filament having been previously 5taken hold of, the movable jaws then open and g are locked apart fromthe fixed jaws by the engagement of the notch in the niovablejaws andthe locking-levers. The filament is thereupon removed, and the device isready to receive another for flashing, which is placed in agroovein thefixed jaws. (Shown in Fig. 3.)

The levers j j are then pushed forward and made to bear upon thefilament, whereupon the locking-levers Z Z leave the notch in these jawsand engage the curved portion of the jaws. The levers are then forceddown, so as to make the jaws firmly clamp the filament, the circuitinthe meantime having been broken by a switch located near by. The globe gis now placed over the device and sealed. The current is'now turned uponthe filament within the globe, which is previously filled with thehydrocarbon gas. The filament is flashed until the desired cross sectionis -reached, whereupon the handle h is manipulated, so as to bring thecontact-bars in contact with the filament, thus short-0i rcuiting thelight-givin g portion of the filament and leaving its ends in thecircuit. from the jaws through the end portions and contact-bars until asufficient deposit is secured upon these end portions, when the currentis taken off and the filament removed, as before.

-\Ve do not wish to confine ourselves to the exact construction andarrangement of devices shown, as the devices may be varied in many wayswithout departing from the spirit of our invention.

What we desire to claim and secure by Let ters Patent ist 1. In a devicefor holding filaments for incandescent lamps while the same are beingprepared, the combination of gravity operating, movable, and fixedjaws,-means for locking the same together, and a part to clamp orunclamp thefilament, and line-connections for each pair ofjaws, whichare snitablyinsulated from each other. v

2. In adevice for holdingincandescentlamp filaments while the same arebeing flashed, the' combination of two fixed jaws, two movable jaws,gravity-levers for each pair of jaws for looking the movable to thefixed jaws to clamp the filament, and line-connections for each pair ofjaws,which are suitably insulated from each other. I

3. In a device for holding incandescent-lamp filaments duringpreparation, the combination of two stationary jaws insulated from eachother and each carrying a movable gravity-jaw for clamping andunclamping the filament, gravity-levers embracing the jaws for lockingthem The current continues to flow' together, and a notch in eachgravity-jaw, which engages the locking-levers to hold the levers intheir raised position, and line-connections to each stationary jaw.

4. In a device for holding incandescent-lamp filaments during treatment,the combination of two fixed jaws, two movable jaws, locking-leversembracing a curved portion of the stationary jaws for forcing the jawstogether to clamp the filament as the locking-levers are made to engagesaid curved portion.

5. In adeviceforholdingincandescent-lamp filaments while being treated,the combination of gravity operating and fixed jaws adapted to grasp thefilament-,plevers forlocking the same together, means for suitablyinsulating the same, and electrical connections for conveying thecurrent to the filament.

6. In a device for'holdingincandescent-lamp filaments while beingtreated, the combination of movable and fixed jaws adapted to grasp thefilament, levers for locking the same together and holding them apart,means for suitably insulating the same, and electrical connections forconveying the current to the filament.

7. The combination, with a device for holding incandescentlamp filamentsduring flashing, suitably sealed and having electrical connections, ofcontact devices for short-circuiting the main portion of said filament,while leaving the lower portion in circuit, for the pur pose set forth,and means outside of the seal for operating said contact devices atwill.

8. In a device forholding incandescent-lamp filaments during flashing,the combination of movable and fixed jaws adapted to clamp the filament,electrical connections, and means for short-circuiting the filamentportion proper when desired and leaving the ends thereof in circuit tocause a greater deposit thereon, for the purpose specified. 1

9. Inadeviceforholding incandescent-lamp filaments during flashing, thecombination of movable and fixed jaws, suitable devices for locking thesame together and apart, electrical connections, and means forshort-circuiting the filament portion proper when desiredand leaving theends thereof in circuit to cause a greater deposit thereon, for thepurpose specified.

In testimony whereof we have hereunto set our hands and seals, this 28thday of July, 1886, in the presence .of the two subscribing witn'esses.

HERMANN LEMI. [L. s.] MERLE J. WIGI-ITMAN. [L.S. \Vitnesses:

LoUIs M. SCHMIDT, \VM. E. SHEPARD.

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